Calculus is a simple math puzzle where you have a board full of numbers. The goal is to make the sum of numbers in each row and column be equal to the answer in the box. What you have to do is to remove some numbers from the equation by clicking on them. It sounds simple but requires a lot of thinking. Using it you can improve your Math Power by solving number Math Puzzle.

** Feature
- A Math Puzzle Game is available with multiple theme colors. You can use any of them by selecting from various colors on main screen.
- The goal is to make the sum of numbers in each row and column be equal to the number in the box.
- What you have to do is to remove some numbers from the equation by clicking on them.
- It sounds simple but requires a lot of thinking.
- The board sizes range from 3×3 to 8×8. There are also 3 levels of difficulty: 1-9, 2-4 and 1-19.
- 1-9 means the numbers to calculate will range from 1 to 9.
- In Classic mode you can choose which board size and difficulty you want to play
- In Endless mode you will be given a puzzle with random size and difficulty.
- Your total wins in any mode is saved.

** Game Modes
-- 1-9 : Number selection range on board will be 1 to 9.
-- 1-19 : Number selection range on board will be 1 to 19.
-- 10-19 : Number selection range on board will be 10 to 19.

** Game has 4 types of boards
- 3x3: There will be 3 columns, 3 rows and 9 Puzzle numbers to select.
- 4x4: There will be 4 columns, 4 rows and 16 Puzzle numbers to select.
- 5x5: There will be 5 columns, 5 rows and 25 Puzzle numbers to select.
- 6x6: There will be 6 columns, 6 rows and 36 Puzzle numbers to select.
- 7x7: There will be 7 columns, 7 rows and 49 Puzzle numbers to select.
- 8x8: There will be 8 columns, 8 rows and 64 Puzzle numbers to select.

** How to Play Calculus - A Math Puzzle Game
- First of all, you have to select Game Mode [1-9, 1-19, 10-19] & Board Size [3X3, 4X4, 5X5, 6X6, 7X7, 8X8]
- Your goal is to remove numbers from the grid so that the remaining numbers in each row or column add up to the numbers next to that row or column.
- Click to remove or turn off a number, or click a removed number to add it back in.

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